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प्रश्न
Depict the orientation of the dipole in (i) stable, (ii) unstable equilibrium in a uniform electric field.
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उत्तर
Depicting the orientation of the dipole in
(i) stable equilibrium in a uniform electric field
Net force is zero in this case as qE - qE = 0
Net torque = pEsinθ as θ = 0°
(ii) unstable equilibrium in a uniform electric field.
Net force is negative in this case as - qE - qE = -2qE
Net torque = pEsinθ as θ = 180°
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संबंधित प्रश्न
An electric dipole of dipole moment`vecp` consists of point charges +q and −q separated by a distance 2a apart. Deduce the expression for the electric field `vecE` due to the dipole at a distance x from the centre of the dipole on its axial line in terms of the dipole moment `vecp`. Hence show that in the limit x>> a, `vecE->2vecp"/"(4piepsilon_0x^3)`
A short electric dipole (which consists of two point charges, +q and -q) is placed at the centre 0 and inside a large cube (ABCDEFGH) of length L, as shown in Figure 1. The electric flux, emanating through the cube is:
a) `q"/"4piin_9L`
b) zero
c) `q"/"2piin_0L`
d) `q"/"3piin_0L`
- Define torque acting on a dipole of dipole moment \[\vec{p}\] placed in a uniform electric field \[\vec{E}\] Express it in the vector from and point out the direction along which it acts. Express it in the vector from and point out the direction along which it acts.
- What happens if the field is non-uniform?
- What would happen if the external field
\[\vec{E}\] is increasing (i) parallel to \[\vec{p}\] and (ii) anti-parallel to \[\vec{p}\]?
It is said that the separation between the two charges forming an electric dipole should be small. In comparison to what should this separation be small?
A uniform electric field is prevailing in X - direction in certain region. The coordinates of points P, Q, and R are (0, 0), (2, 0) and (0, 2) respectively. Which of the following alternatives is true for the potentials at these points?
An electric dipole of moment p is placed parallel to the uniform electric field. The amount of work done in rotating the dipole by 90° is ____________.
Polar molecules are the molecules ______.
Polar molecules are the molecules ______.
In an electric dipole, what is the locus of a point having zero potential?
